CN103398932A - Method and device for quickly testing water seepage properties of low-intensity heat-insulating materials for shafts and drifts - Google Patents
Method and device for quickly testing water seepage properties of low-intensity heat-insulating materials for shafts and drifts Download PDFInfo
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- CN103398932A CN103398932A CN2013103284424A CN201310328442A CN103398932A CN 103398932 A CN103398932 A CN 103398932A CN 2013103284424 A CN2013103284424 A CN 2013103284424A CN 201310328442 A CN201310328442 A CN 201310328442A CN 103398932 A CN103398932 A CN 103398932A
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Abstract
The invention discloses a method and a device for quickly testing the water seepage properties of low-intensity heat-insulating materials for shafts and drifts. After a quick-hardening waterproof swelling colloid layer is injected between a long cylindrical precast test block and a seamless steel tube, one end of the seamless steel tube is connected into a confined water pipe by using a screw thread, and the other end of the seamless steel tube is placed in a water containing measuring jug. Confined water after seeping from the precast test block enters the water containing measuring jug, and a permeability coefficient can be calculated according to a seepage flow and related device parameters. The method and the device disclosed by the invention has the characteristics of being convenient to manufacture, easy to operate, easy and liable, low in test cost, and the like, and can quickly realize a test on the water seepage properties of the low-intensity heat-insulating materials under general conditions, and can fill in a technical gap of the test on the water seepage properties of the low-intensity materials. The device disclosed by the invention is simple in structure, convenient to use and low in cost, and can be applied to various fields of mines, underground spaces, urban construction, structural heat insulation, water resistance, and the like.
Description
Technical field
The present invention relates to a kind of method for rapidly testing and device, especially a kind of method for rapidly testing and device that is applicable to roadway low-intensity heat-barrier material permeability performance.
Background technology
The permeability performance of construction material is the important indicator of weighing the construction material physical property, when the construction materials such as cement commonly used, concrete, masonry material are applied in laboratory and engineering, will its permeability performance be tested, the device of test is the concrete water-permeating test instrument.This concrete water-permeating test instrument test principle is at first construction material to be made to test block, then be placed in the mould of instrument and apply water under high pressure, and the test blocks such as cement, concrete, masonry material are carried out to the press water applied voltage test, after water percolating capacity by test block in the determination test time, by hydraulics seepage calculation formula, just can calculate the seepage coefficient of high-strength material.This test unit requires the intensity of test block of test generally to reach just to bear water under high pressure pressure more than 20MPa and does not produce breakoff phenomenon, and use " low-intensity heat-barrier material " for roadway, its uniaxial compressive strength is generally less than 5MPa, if and the test method of employing high-strength material is carried out the test of permeability performance, there will be the test block material to be destroyed by the water under high pressure pressure break or test block is broken, cause test failure.So prior art and instrument can not be analyzed " low-intensity heat-barrier material " permeability performance.
According to above-mentioned analysis, research and development roadway " low-intensity heat-barrier material " permeability performance device for quick testing, not only can be applied to the calculative determination of roadway " low-intensity heat-barrier material " permeability performance, and, to all kinds of low-intensity materials, such as: the analytical calculation of the barrier performance of the materials such as inorganic and organic insulation material, inorganic and organic water shutoff material, antiseepage enclosed material and low-intensity cohesion concrete is definite, all has an important using value.
Summary of the invention
Technical matters: the objective of the invention is to overcome the problem that exists in prior art, a kind of simple in structure, effective roadway low-intensity heat-barrier material permeability performance method for rapidly testing and device are provided.
Technical scheme: roadway low-intensity heat-barrier material permeability performance method for rapidly testing of the present invention comprises the steps:
The preparation of a, prefabricated test block: adopt the prefabricated test block of right cylinder that is mixed by glass bead, mortar, cement, water, short glass fiber and bentonitic clay, maintenance was used after one month, and the diameter of described prefabricated test block is 50-60mm, and length is 100-120mm;
B, by the prefabricated test block length of packing into, be that 150-170mm, internal diameter are in the weldless steel tube of 60-70mm;
In c, the gap between prefabricated test block and weldless steel tube, inject the Binder Materials that the fine sand, coagulation great soil group swelling agent, the accelerating chemicals that are 0.4-0.5mm by unsaturated polyester, particle diameter are mixed, form rapid hardening waterproof expansion colloid layer,
D, an end of weldless steel tube band screw thread is connected to the pressure-bearing water pipe, injection pressure is less than the voltage stabilizing water of 3MPa, voltage stabilizing water permeates downwards by prefabricated test block, splash in the measuring cup that is filled with water that is located at the weldless steel tube below, by the calibration summary water percolating capacity on the measuring cup that is filled with water, according to the relation of seepage flow and infiltration coefficient, by formula:
In formula: q-seepage discharge (cm
3/ s; m
3/ d),
The water-head (artesian pressure) at h-sample two ends,
L-test block length,
A-test block sectional area (cm
2m
2),
K-infiltration coefficient (cm/s; M/d).
Calculate the infiltration coefficient of different prefabricated test blocks, with this, analyze the permeability performance of various types of materials.
The described glass bead of making the prefabricated test block of right cylinder (1) is 15-17%, and mortar is 18-21%, and cement is 29-31%, and water is 33-28%, and short glass fiber is 3-2%, and bentonitic clay 2-1%, be mass percent.
The described unsaturated polyester of making Binder Materials is 55-60%; 0.4-0.5mm fine sand is 40-35%; Coagulation great soil group swelling agent is 4%; Accelerating chemicals is 1%, is quality
The performance device for quick testing, comprise weldless steel tube, the measuring cup that is filled with water, the prefabricated test block of elongated cylinder is set in described weldless steel tube, between prefabricated test block and weldless steel tube, be provided with rapid hardening waterproof expansion colloid layer, the diameter of described prefabricated test block is 50-60mm, and length is 100-120mm; The internal diameter of described weldless steel tube is 60-70mm, and length is 150-170mm; The top of described weldless steel tube is processed be used to connecting the screw thread of pressure-bearing water pipe.
Beneficial effect: the present invention is by after setting rapid hardening waterproof expansion colloid layer between prefabricated test block and weldless steel tube, then at weldless steel tube one end screw thread cut-in pressure water pipe, the other end is put into the measuring cup that is filled with water.Press water carries out water penetration test by the prefabricated test block of elongated cylindrical, and (the general concrete intensity of test block is larger, and intensity, greater than 20 Mpa, is called high strength; This prefabricated intensity of test block is lower, is generally 3-5Mpa,, be called the low-intensity test block.This low-intensity test block can only adopt osmosis just can carry out the infiltration coefficient test).After infiltration, enter the measuring cup that is filled with water, according to seepage flow and device correlation parameter, can calculate infiltration coefficient.The characteristics such as this test method has easy to make, simple to operate, simple and easy to do, and testing expenses are cheap, under general condition can realize the test of low-intensity heat-barrier material permeability performance fast, filled up the technological gap of low-intensity material permeability performance test.Have simple in structurely, easy to use, with low cost, can be applied to a plurality of fields such as mine, the underground space, urban construction, structural thermal insulation, waterproof, have practicality widely.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is prefabricated test block cross section structure schematic diagram of the present invention.
In figure: the prefabricated test block of 1-; 2-rapid hardening waterproof expansion colloid layer; The 3-weldless steel tube; The 4-measuring cup that is filled with water.
Embodiment
The preparation of a, prefabricated test block: adopt and be mixed and made into by mass percentage cylindrical prefabricated test block 1 by glass bead, mortar, cement, water, short glass fiber and bentonitic clay, the diameter of prefabricated test block 1 is 50-60mm, and length is 100-120mm; The described glass bead of making the prefabricated test block 1 of right cylinder is 15%, and mortar is 20%, and cement is 30%, and water is 30%, and short glass fiber is 3%, bentonitic clay 2%;
According to above ratio, get glass bead and get 300 grams, mortar 400 grams, cement 600 grams, water 600 grams, short glass fiber 60 grams, bentonitic clay 40 grams, gross mass 1800 grams, after mixing, make a plurality of cylindrical prefabricated test blocks, maintenance was used after one month;
B, by prefabricated test block 1 length of packing into, be that 150-170mm, internal diameter are in the weldless steel tube 3 of 60-70mm;
The Binder Materials that fine sand, coagulation great soil group swelling agent, the accelerating chemicals that to inject by mass percentage by unsaturated polyester, particle diameter in c, the gap between prefabricated test block 1 and weldless steel tube 3 be 0.4-0.5mm is mixed, form rapid hardening waterproof expansion colloid layer 2; The described unsaturated polyester of making Binder Materials is 55%; 0.4-0.5mm fine sand is 40%; Coagulation great soil group swelling agent is 4%; Accelerating chemicals is 1%;
According to above ratio, get unsaturated polyester 550 grams, particle diameter 0.4-0.5mm fine sand and get that 400 grams, coagulation great soil group swelling agent are got 40 grams, accelerating chemicals is got 10 grams and evenly mixed, gross mass 1000 grams; Binder Materials preparation before cast is used is namely used;
D, at weldless steel tube 3, with an end of screw thread, connect the pressure-bearing water pipe, injection pressure is less than the voltage stabilizing water of 3MPa, voltage stabilizing water permeates downwards by prefabricated test block 1, splash in the measuring cup 4 that is filled with water that is located at weldless steel tube 3 belows, by the calibration summary water percolating capacity on the measuring cup 4 that is filled with water, according to the relation of seepage flow and infiltration coefficient, by formula:
In formula: q-seepage discharge (cm
3/ s; m
3/ d),
The water-head (artesian pressure) at h-sample two ends,
L-test block length,
A-test block sectional area (cm
2m
2),
K-infiltration coefficient (cm/s; M/d),
Calculate the infiltration coefficient of all kinds of prefabricated test blocks, with this, analyze the various types of materials permeability performance.
According to experimental result, calculate the infiltration coefficient of all kinds of prefabricated test blocks.According to experimental result can the qualitative analysis material thermal insulation and superiority.By infiltration coefficient, material property is analyzed: infiltration coefficient is larger, and the material heat-proof quality is poorer; Otherwise better.
Realize the roadway low-intensity heat-barrier material permeability performance device for quick testing of said method, mainly by prefabricated test block 1, rapid hardening waterproof expansion colloid layer 2, weldless steel tube 3, the measuring cup 4 that is filled with water, formed.In the interior prefabricated test block 1 that elongated cylinder is set of described weldless steel tube 3; prefabricated test block 1 is mixed by glass bead, mortar, cement, water, short glass fiber and bentonitic clay; prefabricated test block 1 is sleeved in the rapid hardening waterproof expansion colloid layer 2 of tubulose, and rapid hardening waterproof expansion colloid layer 2 is sleeved in weldless steel tube 3.The diameter of described prefabricated test block 1 is 50-60mm, and length is 100-120mm; The internal diameter of described weldless steel tube 3 is 60-70mm, and length is 150-170mm; The top of described weldless steel tube 3 is processed be used to connecting the screw thread of pressure-bearing water pipe.
The glass bead of making by mass percentage the prefabricated test block 1 of right cylinder is 17%, and mortar is 18%, and cement is 29%, and water is 31%, and short glass fiber is 3%, bentonitic clay 2%.
According to above ratio, get glass bead 340 grams, mortar 360 grams, cement 580 grams, water 620 grams, short glass fiber 60 grams, bentonitic clay 40 grams and evenly mix, gross mass 1800 grams.After mixing, make a plurality of cylindrical prefabricated test blocks, maintenance was used after one month.
The described unsaturated polyester of making Binder Materials is 57%; 0.4-0.5mm fine sand is 38%; Coagulation great soil group swelling agent is 4%; Accelerating chemicals is 1%.
According to above ratio, get unsaturated polyester 570 grams, particle diameter 0.4-0.5mm fine sand and get that 380 grams, coagulation great soil group swelling agent are got 40 grams, accelerating chemicals is got 10 grams and evenly mixed, gross mass 1000 grams.Binder Materials preparation before cast is used is namely used.
Embodiment 3, substantially the same manner as Example 1, something in common slightly.Difference:
The glass bead of making by mass percentage the prefabricated test block 1 of right cylinder is 16%, and mortar is 19%, and cement is 29%, and water is 32%, and short glass fiber is 2%, bentonitic clay 2%.
According to above ratio, get glass bead 340 grams, mortar 360 grams, cement 580 grams, water 620 grams, short glass fiber 60 grams, bentonitic clay 40 grams and evenly mix, gross mass 1800 grams.
The described unsaturated polyester of making Binder Materials is 56%; 0.4-0.5mm fine sand is 95%; Coagulation great soil group swelling agent is 4%; Accelerating chemicals is 1%.
According to above ratio, get unsaturated polyester 560 grams, particle diameter 0.4-0.5mm fine sand and get that 390 grams, coagulation great soil group swelling agent are got 40 grams, accelerating chemicals is got 10 grams and evenly mixed, gross mass 1000 grams.Binder Materials preparation before cast is used is namely used.
Claims (5)
1. a roadway low-intensity heat-barrier material permeability performance method for rapidly testing, is characterized in that, comprises the steps:
The preparation of a, prefabricated test block: adopt the prefabricated test block of right cylinder (1) that is mixed by glass bead, mortar, cement, water, short glass fiber and bentonitic clay, maintenance was used after one month, the diameter of described prefabricated test block (1) is 50-60mm, and length is 100-120mm;
B, by prefabricated test block (1) length of packing into, be that 150-170mm, internal diameter are in the weldless steel tube (3) of 60-70mm;
In c, the gap between prefabricated test block (1) and weldless steel tube (3), inject the Binder Materials that the fine sand, coagulation great soil group swelling agent, the accelerating chemicals that are 0.4-0.5mm by unsaturated polyester, particle diameter are mixed, form rapid hardening waterproof expansion colloid layer (2)
D, weldless steel tube (3) is connected to the pressure-bearing water pipe with an end of screw thread, injection pressure is less than the voltage stabilizing water of 3MPa, voltage stabilizing water is by prefabricated test block (1) infiltration downwards, splash in the measuring cup that is filled with water (4) that is located at weldless steel tube (3) below, by the calibration summary water percolating capacity on the measuring cup that is filled with water (4), according to the relation of seepage flow and infiltration coefficient, by formula:
In formula: q-seepage discharge (cm
3/ s; m
3/ d),
The water-head (artesian pressure) at h-sample two ends,
L-test block length,
A-test block sectional area (cm
2m
2),
K-infiltration coefficient (cm/s; M/d).
2. calculate the infiltration coefficient of different prefabricated test blocks, with this, analyze the permeability performance of various types of materials.
3. roadway low-intensity heat-barrier material permeability performance method for rapidly testing according to claim 1; it is characterized in that; the described glass bead of making the prefabricated test block of right cylinder (1) is 15-17%; mortar is 18-21%; cement is 29-31%, and water is 33-28%, and short glass fiber is 3-2%; bentonitic clay 2-1%, be mass percent.
4. roadway low-intensity heat-barrier material permeability performance method for rapidly testing according to claim 1, is characterized in that, the described unsaturated polyester of making Binder Materials is 55-60%; 0.4-0.5mm fine sand is 40-35%; Coagulation great soil group swelling agent is 4%; Accelerating chemicals is 1%, is mass percent.
5. roadway low-intensity heat-barrier material permeability performance device for quick testing of realizing the described method of claim 1, comprise weldless steel tube (3), the measuring cup that is filled with water (4), it is characterized in that: the prefabricated test block (1) of elongated cylinder is set in described weldless steel tube (3), between prefabricated test block (1) and weldless steel tube (3), be provided with rapid hardening waterproof expansion colloid layer (2), the diameter of described prefabricated test block (1) is 50-60mm, and length is 100-120mm; The internal diameter of described weldless steel tube (3) is 60-70mm, and length is 150-170mm; The top of described weldless steel tube (3) is processed be used to connecting the screw thread of pressure-bearing water pipe.
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| CN107036926A (en) * | 2017-04-28 | 2017-08-11 | 中天科技海缆有限公司 | It is a kind of to be used to measure insulating material of polymer seawater depth of penetration and the sample structure and its application method of concentration under abyssal environment |
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| CN107036926A (en) * | 2017-04-28 | 2017-08-11 | 中天科技海缆有限公司 | It is a kind of to be used to measure insulating material of polymer seawater depth of penetration and the sample structure and its application method of concentration under abyssal environment |
| CN107036926B (en) * | 2017-04-28 | 2019-12-06 | 中天科技海缆有限公司 | Sample structure for measuring seawater penetration depth and concentration of polymer insulation material in deep sea environment and using method thereof |
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